Is enabling --rect worth the increased encoding time? Does it give enough quality improvement? It slows down my encode by 41%.
My settings are approximately the same as the "slow" preset, except that I use CTU 32 instead of 64, and merange of 26. (2 pass encode, 1080p.)
Should I change parameters other than rect, to gain more quality per bit? Or does rect bring enough quality improvement to justify the 41% increase in encode time?